Abstract for Chalmers’ talk

Is it possible that everything that seems to be on your left is actually on your right?  Is it possible that everything in the world is twice as big as it seems to be?  Is it possible that everything that seems square is actually an extended rectangle?  Through reflection on these and related puzzles I will address some central issues regarding the content of spatial experience.  I will use this analysis to shed light on puzzles about skepticism concerning the external world.